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【多选题】
拆除脚手架时应符合下列哪些规定( )A.
拆除作业必须由上而下逐层进行，严禁上下同时作业
B.
拆除全部拆完小横杆，再拆大横杆
C.
连墙件必须随脚手架逐层拆除，严禁先将连墙件或数层拆除后再拆脚手架
D.
分段拆除高差不应大于2步
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举一反三
【判断题】We can infer that today's baseball player's inappropriate behavior has made baseball less popular and less respectable.
A.
正确
B.
错误
【单选题】—Is that a baseball? —______. [ ]
A.
Yes, that is.
B.
No, it isn't.
C.
Yes, it's.
D.
It's a baseball.
【单选题】关于气管的描述，错误的是
A.
气管可分为气管颈部和气管胸部两段
B.
气管下端于胸骨角平面分为左、右主支气管
C.
气管隆嵴是气管镜检辨认左、右主支气管起点的标志
D.
在小儿，气管与胸骨柄之间有发达的胸腺充填
E.
右主支气管的长度为左主支气管长度的2倍
【单选题】They’re not playing baseball today ___________ the rain.
A.
because
B.
as
C.
since
D.
because of
【简答题】Baseball is one of the favorite sports in the U.S.A. Children play baseball in sports fields or parks. At summer picnic, there is often an informal（非正式的） baseball . Boys and girls, young and old t...
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